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Does the Modified Gartland Classification Clarify Decision Making?

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The Gartland classification system for pediatric supracondylar humerus fractures shows moderate reliability. While operative decisions for types I and III fractures are consistent, differentiating between type IIa and IIb has low reliability.

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Area of Science:

  • Orthopaedic surgery
  • Pediatric orthopaedics
  • Skeletal trauma

Background:

  • The Gartland classification system is crucial for managing pediatric supracondylar humerus fractures.
  • Accurate classification guides decisions regarding operative versus nonoperative treatment.
  • Assessing the reliability of this system is vital for consistent clinical practice.

Purpose of the Study:

  • To evaluate the interobserver and intraobserver reliability of the modified Gartland classification for pediatric supracondylar humerus fractures.
  • To determine the agreement among surgeons on operative versus nonoperative treatment decisions, irrespective of the classification.
  • To identify specific areas of disagreement within the classification system.

Main Methods:

  • Retrospective review of 200 pediatric supracondylar humerus fracture radiographs (anteroposterior and lateral views).
  • Classification by 3 fellowship-trained pediatric orthopaedic surgeons and 2 orthopaedic residents using the modified Gartland system (Types I, IIa, IIb, III).
  • Surgeons recorded treatment recommendations (nonoperative vs. operative); reliability assessed using kappa (κ) coefficients.

Main Results:

  • Overall interobserver reliability for the modified Gartland classification was low-to-moderate (κ=0.475), while intraobserver reliability was high (κ=0.777).
  • Interobserver reliability was particularly low when distinguishing between Type IIa and IIb fractures (κ=0.240) among attending surgeons.
  • Interobserver reliability for operative decision-making was moderate-to-high (κ=0.691), with high intraobserver reliability (κ=0.760); residents showed decreased interobserver reliability for treatment decisions.

Conclusions:

  • High agreement exists for nonoperative treatment of Type I and operative treatment of Type III pediatric supracondylar humerus fractures.
  • Type IIb fractures are consistently recommended for operative treatment, and Type IIa for nonoperative management.
  • The distinction between Type IIa and IIb fractures lacks sufficient interobserver reliability, suggesting that a treatment-decision-based classification may be more clinically useful.